Braille Micro-Lite Lithium Batteries feature carbon composite casings with CNC precision cell top design and ultra-lightweight lithium-ion chemistry. These batteries deliver a higher, cleaner, and more stable voltage through 80%-90% discharge of the battery (no voltage sag) and will see quicker starting, improved engine management, less horsepower draw from the alternator due to efficient charging (5 times faster than lead), and last 3-5 times longer with very little performance loss over the life of the battery. High-current interconnects, proprietary sine-wave balancing, and high-amp brass terminals round out this exciting technology. These batteries are made in the USA and hand-selected by a Braille factory technician!